Effect of Ignition Location on Premixed Flame Propagation in Rotating Vessel

• Autorzy: Shoshin Y. , Gorczakowski A.
• Języki publikacji: EN

Abstrakty

EN

Processes of premixed methane/air and propane/air flames propagation in a closed rotating cylindrical vessel with ignition at the rotation axis and near the cylindrical wall are compared experimentally. At studied vessel rotation rates 2000-6000 rpm much faster burning rates were observed in case of off-axis ignition. Similar to earlier observations, in case of on-axis ignition a flame extinction was observed before flame reached cylindrical wall. A semi-empirical analytical model describing gas angular velocity distribution during a premixed flame propagation in a closed rotating cylindrical vessel, with ignition at the rotation axis, is developed. It is shown that during flame propagation combustion products rotate much slower than the vessel and strong gas velocity gradients must exists in boundary layer near flat walls of a cylinder. The angular velocity of fresh mixture increases with distance from the rotation and approaches vessel angular velocity near the cylindrical wall of a vessel. It is speculated that these characteristic features of gas flow pattern may be responsible for faster combustion of off-center ignited mixtures, compared to the case of on-axis ignitions, and for the observed extinction behaviour of flame extinction when mixture is ignited at the axis of rotation.

Słowa kluczowe

EN

rotating cylindrical vessel; flames propagation

• Wydawca: Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archivum Combustionis
• Rocznik: 2008
• Tom: Vol. 28 nr 3-4
• Strony: 187--196

Twórcy

autor

Shoshin Y.

autor

Gorczakowski A.

• Department of Heat Technology and Refrigeration Technical University of Lodz Stefanowskiego 1/15, 90-924 Lodz, Poland,